<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
		
		<style type="text/css">
			div {
				width: 100px;
				height: 100px;
				border: 1px solid black;   /*边框*/
 			}
 			
 			.box2 {
 				margin: 50px auto 0 auto;
 				padding: 100px 100px 100px 100px;
 				/*padding: 100px;*/
 			}
		</style>
		
	</head>
	<body>
		
		<div></div>
		<div class="box2"></div>
		
	</body>
</html>
